Updated on 2023/01/12

写真a

 
KUWAHARA, Makoto
 
Organization
Institute of Materials and Systems for Sustainability Advanced Measurement Technology Center (AMTC) Electron Nanoscopy Section Associate professor
Graduate School
Graduate School of Engineering
Title
Associate professor

Degree 1

  1. Doctor of Science ( 2007.1   Nagoya University ) 

Research Interests 6

  1. quantum device

  2. quantum beam

  3. optical properties of semiconductor

  4. electron spin

  5. particle accelerator

  6. electron microscopy

Research Areas 1

  1. Others / Others  / Elementary Particle/Atomic Nucleus/Cosmic Ray/Space Physics

Current Research Project and SDGs 1

  1. Advanced Electron Microscopy Using Coherent Spin-Polarized Pulse Beam

Research History 2

  1. Research Fellow of Japan Science and Technology Agency

    2007.4 - 2009.3

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    Country:Japan

  2. Research Fellow of the Japan Society for the Promotion of Science

    2005.4 - 2007.3

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    Country:Japan

Education 3

  1. Nagoya University   Graduate School, Division of Science   Division of Particle and Astrophysical Science

    2003.4 - 2007.1

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    Country: Japan

  2. Nagoya University   Graduate School, Division of Natural Science   Division of Particle and Astrophysical Science

    2001.4 - 2003.3

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    Country: Japan

  3. Nagoya University   Faculty of Science   Department of Physics

    1997.4 - 2001.3

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    Country: Japan

Professional Memberships 4

  1. The Japanese Society of Microscopy

  2. the Japan Society of Applied Physics

  3. The Physical Society of Japan

  4. アメリカ物理学会

Committee Memberships 2

  1. 日本物理学会 名古屋支部会計   委員  

    2018.4 - 2020.3   

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    Committee type:Academic society

  2. 日本物理学会 領域10運営委員   委員  

    2017.4 - 2019.3   

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    Committee type:Academic society

Awards 4

  1. The 15th Kazato Prize

    2022.4   Kazato Research Foundation   Development of time-resolved transmission electron microscope using a pulsed electron source with high spin-polarization

    Makoto Kuwahara

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    Award type:Award from publisher, newspaper, foundation, etc. 

  2. 第37回日本顕微鏡学会和文誌賞

    2022.5   日本顕微鏡学会   パルス電子波を用いた時間分解透過電子顕微鏡

    桑原真人、横井里奈、水野りら、冨樫将孝、吉田優也、永田渉、古井雅人、中蔵虎二郎、石田高史

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    Award type:Honored in official journal of a scientific society, scientific journal 

  3. 日本顕微鏡学会 第19回奨励賞

    2018.5   公益社団法人日本顕微鏡学会  

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  4. 日本物理学会 第10回若手奨励賞

    2016.3   日本物理学会  

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    Country:Japan

 

Papers 84

  1. Copper sulfide nanoribbon growth triggered by carbon nanotube aggregation via dialysis Reviewed

    Tomomi Tanaka, Misaki Kurihara, Makoto Kuwahara, Shota Kuwahara

    RSC ADVANCES   Vol. 12 ( 48 ) page: 31363 - 31368   2022.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: DOI: 10.1039/d2ra04832a

  2. Extension of focal depth by electron quasi-Bessel beam in atomic-resolution scanning transmission electron microscopy Reviewed

    Takafumi Ishida, Takeshi Owaki, Masahiro Ohtsuka, Makoto Kuwahara, Koh Saitoh, Tadahiro Kawasaki

    Applied Physics Express   Vol. 15   page: 115001   2022.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.35848/1882-0786/ac96ce

  3. Transient electron energy-loss spectroscopy of optically stimulated gold nanoparticles using picosecond pulsed electron beam Reviewed

    Makoto Kuwahara, Lira Mizuno, Rina Yokoi, Hideo Morishita, Takafumi Ishida, Koh Saitoh, Nobuo Tanaka, Shota Kuwahara, Toshihide Agemura

    Applied Physics Letters   Vol. 121 ( 14 ) page: 143503   2022.10

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/5.0108266

  4. Nanoscale Characteristics of a Room-Temperature Coexisting Phase of Magnetic Skyrmions and Antiskyrmions for Skyrmion–Antiskyrmion-Based Spintronic Applications Reviewed

    Daigo Shimizu, Tomoki Nagase, Yeong-Gi So, Makoto Kuwahara, Nobuyuki Ikarashi, and Masahiro Nagao

    ACS Applied Nano Materials     2022.8

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1021/acsanm.2c03162

  5. Generation of sub-100 fs electron pulses for time-resolved electron diffraction using a direct synchronization method Reviewed

    Kou Takubo, Samiran Banu, Sichen Jin, Misaki Kaneko, Wataru Yajima, Makoto Kuwahara, Yasuhiko Hayashi, Tadahiko Ishikawa, Yoichi Okimoto, Masaki Hada, and Shinya Koshihara

    Review of Scientific Instruments   Vol. 93 ( 5 ) page: 053005   2022.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1063/5.0086008

  6. Improvement of type-I method for observing magnetic contrast using scanning electron microscope under tilting-deceleration condition Invited Reviewed

    HideoMorishita, Teruo Kohashi, Hiroyuki Yamamoto, Makoto Kuwahara

    Journal of Magnetism and Magnetic Materials     page: 168733   2021.11

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1016/j.jmmm.2021.168733

  7. Brightness evaluation of pulsed electron gun using negative electron affinity photocathode developed for time-resolved measurement using scanning electron microscope Reviewed

    1. H. Morishita, T. Ohshima, K. Otsuga, M. Kuwahara, T. Agemura, Y. Ose

    Ultramicroscopy   Vol. 230   page: 113386   2021.9

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1016/j.ultramic.2021.113386

  8. Photoinduced oxygen transport in cobalt double-perovskite crystal EuBaCo2O5.39 Reviewed

    2. M. Hada, S. Ohmura, T. Ishikawa, M. Saigo, N. Keio, W. Yajima, T. Suzuki, D. Urushihara, K. Takubo, Y. Masaki, M. Kuwahara, K. Tsuruta, Y. Hayashi, J. Matsuo, T. Yokoya, K. Onda, F. Shimojo, M. Hase, S. Ishihara, T. Asaka, N. Abe, T. Arima, S. Koshihara, Y. Okimoto

    Applied Materials Today   Vol. 24   page: 101167   2021.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1016/j.apmt.2021.101167

  9. Observation of domain wall bimerons in chiral magnets Reviewed

    T. Nagase, Y. G. So, H. Yasui, T. Ishida, H. K. Yoshida, Y. Tanaka, K. Saitoh, N. Ikarashi, Y. Kawaguchi, M. Kuwahara, M. Nagao

    Nature Communications   Vol. 12   page: 3490   2021.7

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1038/s41467-021-23845-y

  10. Intensity Interference in a Coherent Spin-Polarized Electron Beam Reviewed

    Makoto Kuwahara, Yuya Yoshida, Wataru Nagata, Kojiro Nakakura, Masato Furui, Takafumi Ishida, Koh Saitoh, Toru Ujihara, and Nobuo Tanaka

      ( 126 ) page: 125501   2021.3

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevLett.126.125501

  11. Time-resolved Transmission Electron Microscope Using Pulsed Electron Waves Invited Reviewed

    Makoto Kuwahara, Rina Yokoi, Lira Mizuno, Nobutaka Togashi, Yuya Yoshida, Wataru Nagata, Masato Furui, Kojiro Nakakura and Takafumi Ishida

    Kenbikyo   Vol. 55 ( 3 ) page: 131 - 138   2020.12

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.11410/kenbikyo.55.3_131

  12. Performance of a silicon-on-insulator direct electron detector in a low-voltage transmission electron microscope Reviewed

    T. Ishida, A. Shinozaki, M. Kuwahara, T. Miyoshi, K. Saitoh, Y. Arai

    Microscopy     2020.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1093/jmicro/dfaa072

  13. Room-temperature magnetic skyrmion in epitaxial thin films of Fe2-xPdxMo3N with the filled beta-Mn-type chiral structure

      Vol. 117 ( 14 )   2020.10

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/5.0024071

    Web of Science

  14. Localized Surface Plasmon Resonance-Induced Welding of Gold Nanotriangles and the Local Plasmonic Properties for Multicolor Sensing and Light-Harvesting Applications International journal

    Shota Kuwahara, Yuka Narita, Lila Mizuno, Hiroki Kurotsu, Hiroki Yoshino, and Makoto Kuwahara

    ACS Applied Nano Materials   Vol. 3 ( 6 ) page: 5172 - 5177   2020.6

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsanm.0c00608

    Web of Science

  15. Resolution improvement of low-voltage scanning electron microscope by bright and monochromatic electron gun using negative electron affinity photocathode International journal

    H. Morishita, T. Ohshima, M. Kuwahara, Y. Ose, T. Agemura

    Journal of Applied Physics   Vol. 127 ( 16 ) page: 164902   2020.4

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/5.0005714

    Web of Science

  16. Smectic Liquid-Crystalline Structure of Skyrmions in Chiral Magnet Co8.5Zn7.5Mn4(110) Thin Film

      Vol. 123 ( 13 )   2019.9

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevLett.123.137203

    Web of Science

  17. スピン偏極パルス透過電子顕微鏡の開発 Reviewed

    桑原真人

    まてりあ   Vol. 58 ( 5 ) page: 269-274   2019.5

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    レーザー駆動型電子線源を活用した新しい分析手法を紹介.コヒーレントパルス電子線の利用により,電子顕微鏡を用いた材料分析に新たな測定軸を提供する

    DOI: 10.2320/materia.58.269

  18. Development of angle-resolved spectroscopy system of electrons emitted from a surface with negative electron affinity state

    Ichihashi Fumiaki, Dong Xinyu, Inoue Akito, Kawaguchi Takahiko, Kuwahara Makoto, Ito Takahiro, Harada Shunta, Tagawa Miho, Ujihara Toru

    REVIEW OF SCIENTIFIC INSTRUMENTS   Vol. 89 ( 7 )   2018.7

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.5021116

    Web of Science

  19. Coherent pulse beam in spin-polarized TEM using an NEA photocathode

    Kuwahara M., Ujihara T., Saitoh K., Tanaka N.

    2018 31ST INTERNATIONAL VACUUM NANOELECTRONICS CONFERENCE (IVNC)     2018

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    Web of Science

  20. Temperature dependence of carrier relaxation time in gallium phosphide evaluated by photoemission measurements

    Ichihashi Fumiaki, Kawaguchi Takahiko, Dong Xinyu, Kuwahara Makoto, Ito Takahiro, Harada Shunta, Tagawa Miho, Ujihara Toru

    AIP ADVANCES   Vol. 7 ( 11 )   2017.11

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.4997800

    Web of Science

  21. Coherence of a pulsed electron beam extracted from a semiconductor photocathode in transmission electron microscope Reviewed

    M. Kuwahara, K. Aoki, H. Suzuki, H. Asano, T. Ujihara, K. Saitoh, N. Tanaka

    European Microscopy Congress 2016     2016.12

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1002/9783527808465.EMC2016.5203

  22. The Boersch effect in a picosecond pulsed electron beam emitted from a semiconductor photocathode Reviewed

    Makoto Kuwahara, Yoshito Nambo, Kota Aoki, Kensuke Sameshima, Xiuguang Jin, Toru Ujihara, Hidefumi Asano, Koh Saitoh, Yoshikazu Takeda, and Nobuo Tanaka

    Applied Physics Letters   Vol. 109   page: 013108   2016.7

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    DOI: 10.1063/1.4955457

  23. Ultrafast Time-Resolution and the Beam Quality in Spin-Polarized Pulsed-TEM Invited Reviewed

    M. Kuwahara, T. Ujihara, H. Asano, K. Saitoh, N. Tanaka

      Vol. 50 ( 3 ) page: 151-155   2016.1

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  24. Measurement of energy distribution of conduction electrons in superlattice by visible-light photoemission spectroscopy Reviewed

    F. Ichihashi, K. Nishitani, X. Dong, T. Kawaguchi, M. Kuwahara, T. Ito, S. Harada, M. Tagawa, T.Ujihara

    2015 IEEE 42nd Photovoltaic Specialist Conference (PVSC)     page: 1-4   2015.12

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    DOI: 10.1109/PVSC.2015.7356192

  25. Coherences of spin-polarized and pulsed electron beam extracted from a semiconductor photocathode in TEM Reviewed

    M. Kuwahara, K. Sameshima, K. Aoki, H. Asano, T. Ujihara, K. Saitoh, N. Tanaka

    Microscopy   Vol. 64 ( 1 ) page: i17   2015.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1093/jmicro/dfv084

  26. Photoemission lifetime of a negative electron affinity gallium nitride photocathode Reviewed

    T. Nishitani, M. Tabuchi, H. Amano, T. Maekawa, M. Kuwahara, T. Meguro

    Journal of Vacuum Science & Technology B   Vol. 32   page: 06F901   2014.11

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    DOI: https://doi.org/10.1116/1.4901566

  27. Coherence of a spin-polarized electron beam emitted from a semiconductor photocathode in a transmission electron microscope Reviewed

    M. Kuwahara, S. Kusunoki, Y. Nambo, X. G. Jin, T. Ujihara, H. Asano, Y. Takeda, N. Tanaka

    Applied Physics Letters   Vol. 105   page: 193101   2014.11

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    DOI: 10.1063/1.4901745

  28. Direct measurement of conduction miniband structure in superlattice by visible-light photoemission spectroscopy Reviewed

    F. Ichihashi, D. Shimura, K. Nishitani, T. Kawaguchi, M. Kuwahara, T. Ito, S. Harada, H. Katsuno, M. Tagawa, T. Ujihara

    2014 IEEE 40th Photovoltaic Specialist Conference (PVSC)     2014.10

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    DOI: 10.1109/PVSC.2014.6925534

  29. Experimental investigation of an optimum configuration for a high-voltage photoemission gun for operation > 500 kV Reviewed

    N. Nishimori, R. Nagai, S. Matsuba, R. Hajima, M. Yamamoto, Y. Honda, T. Miyajima, H. Iijima, M. Kuriki, M. Kuwahara

    Phys. Rev. ST. Accel. Beam   Vol. 17   page: 053401   2014.5

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  30. Spatial and temporal coherence in spin-polarized transmission electron microscopy Reviewed

    M, Kuwahara, S. Kusunoki, Y. Nambo, K. Sameshima, K. Saitoh, T. Ujihara, H. Asano, Y. Takeda, N. Tanaka

    AMTC Letters   Vol. 4   page: 262   2014.5

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  31. Nano-second Time-Resolved Measurement in Spin-Polarized Pulse TEM Reviewed

    Y. Nambo, M. Kuwahara, S. Kusunoki, K. Sameshima, K. Saitoh, T. Ujihara, H. Asano, Y. Takeda, N. Tanaka

    AMTC Letters   Vol. 4   page: 256   2014.5

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  32. Electron spectroscopy of conduction electrons excited by visible light utilizing NEA surface Reviewed

    F. Ichihashi. D. Shimura, K. Nishitani, M. Kuwahara, T. Ito, S. Harada, M. Tagawa, T. Ujihara

    2013 IEEE 39th Photovoltaic Specialists Conference (PVSC)     2014.2

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    DOI: 10.1109/PVSC.2013.6744149

  33. Ultrahigh-resolution direct observation of mini-bands formed in InGaAs/AlGaAs superlattice Reviewed

    D. Shimura, F. Ichihashi, K. Nishitani, S. Harada, M. Kuwahara, T. Ito, M. Matsunami, S. Kimura, T. Sakai, M. Tagawa, T. Ujihara

    2013 IEEE 39th Photovoltaic Specialists Conference (PVSC)     2014.2

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    DOI: 10.1109/PVSC.2013.6744154

  34. Progress in photocathode dc gun at the compact ERL Reviewed

    N. Nishimori, R. Nagai, S. Matsuba, R. Hajima, M. Yamamoto, Y. Honda, T. Miyajima, H. Iijima, M. Kuriki, M. Kuwahara

    Proceedings of 35th International Free-Electron Laser Conference     page: 184   2013.8

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  35. Temporal response measurements of GaAs-based photocathodes Reviewed

    Y. Honda, S. Matsuba, X. G. Jin, T. Miyajima, M. Yamamoto, T. Uchiyama, M. Kuwahara, Y. Takeda

    Jpn. J. Appl. Phys   Vol. 52   page: 086401   2013.7

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  36. Phase-locking of oscillating images using laser-induced spin-polarized pulse TEM Reviewed

    Makoto Kuwahara, Yoshito Nambo, Soichiro Kusunoki, Xiuguang Jin, Koh Saitoh, Hidefumi Asano, Toru Ujihara, Yoshikazu Takeda, Tsutomu Nakanishi, and Nobuo Tanaka

    Microscopy     2013.6

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1093/jmicro/dft035

  37. Generation of a 500-keV electron beam from a high voltage photoemission gun Reviewed

    Nobuyuki Nishimori, Ryoji Nagai, Shunya Matsuba, Ryoichi Hajima, Masahiro Yamamoto, Tsukasa Miyajima, Yosuke Honda, Hokuto Iijima, Masao Kuriki, and Makoto Kuwahara

    Applied Physics Letters   Vol. 102   page: 234103   2013.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.4811158

  38. Temporal Generation of a 500-keV electron beam from a high voltage photoemission gun Reviewed

    N. Nishimori, R. Nagai, S. Matsuba, R. Hajima, M. Yamamoto, Y. Honda, T. Miyajima, H. Iijima, M. Kuriki, M. Kuwahara

    Appl. Phys. Lett.   Vol. 102   page: 234103   2013.6

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  39. Development of Spin-Polarized and Pulsed Transmission Electron Microscope Invited Reviewed

    Makoto Kuwahara, Tsutomu Nakanishi, Yoshikazu Takeda, Nobuo Tanaka

    KENBIKYO   Vol. 48 ( 1 ) page: 3-8   2013.6

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    Authorship:Lead author   Language:Japanese  

  40. Progress in a photocathode DC gun at the compact ERL

    N. Nishimori, R. Nagai, S. Matsuba, R. Hajima, M. Yamamoto, Y. Honda, T. Miyajima, H. Iijima, M. Kuriki, M. Kuwahara

    FEL 2013: Proceedings of the 35th International Free-Electron Laser Conference     page: 184-188   2013.1

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  41. Development of a photoemission dc gun at JARA Reviewed

    N. Nishimori, R. Nagai, S. Matsuba, R. Hajima, M. Yamamoto, Y. Honda, T. Miyajima, H. Iijima, M. Kuriki, M. Kuwahara

    Proceedings of 34th International Free Electron Laser Conference     page: 161   2012.8

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  42. 30-kV spin-polarized transmission electron microscope using GaAs-GaAsP strained superlattice photocathode Reviewed

    M Kuwahara, S. Kusunoki, X. G. Jin, T. Nakanishi, Y Takeda, K Saitoh, T Ujihara, H Asano, N Tanaka

    Applied Physics Letters   Vol. 101   page: 033102   2012.7

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  43. Development of Spin-Polarized and Pulsed TEM Reviewed

    M Kuwahara, F. Ichihashi, S. Kusunoki, Y Takeda, K Saitoh, T Ujihara, H Asano, T. Nakanishi, N Tanaka

    Journal of Physics: Conference Series   Vol. 371   page: 012004   2012.7

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  44. Spin-polarized TEM using an NEA photocathode Reviewed

    M. Kuwahara

    Advanced Microscopy and Theoretical Calculations Letters   Vol. 3   page: 180   2012.5

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  45. Mean Transverse Energy Measurement of Negative Electron Affinity GaAs-Based Photocathode Reviewed

    S. Matsuba, Y. Honda, X. G. Jin, T. Miyajima, M. Yamamoto, T. Uchiyama, M. Kuwahara, Y. Takeda

    Japanese Journal of Applied Physics   Vol. 51   page: 046402   2012.3

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  46. Development of spin-polarized transmission electron microscope Reviewed

    M. Kuwahara, Y. Takeda, K. Saitoh, T. Ujihara, H. Asano, T. Nakanishi, N Tanaka

    Journal of Physics: Conference Series   Vol. 298   page: 012016   2011.6

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  47. Development of a 500-kV photocathode DC gun for ERLs Reviewed

    N Nishimori, R Nagai, M Yamamoto, Y Honda, T Miyajima, H Iijima, M Kuriki, M Kuwahara, S Okumi, T Nakanishi, R Hajima

    Journal of Physics: Conference Series   Vol. 298   page: 012005   2011.6

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  48. Dark-lifetime degradation of GaAs photo-cathode at higher temperature Reviewed

    M. Kuriki, C. Shonaka, H. Iijima, D. Kubo, H. Okamoto, H. Higaki, K. Ito, M. Yamamoto, T. Konomi, S. Okumi, M. Kuwahara, T. Nakanishi

    Nucl. Instr. and Meth.A   Vol. 637 ( 1 ) page: S87-S90   2011.5

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  49. Pulsed spin-polarized electron source toward a transmission electron microscope

    M. Kuwahara, T. Nakanishi, N. Tanaka, Y. Takeda, H. Asano, K. Saito, T. Ujihara

    Proceedings of The 17th IFSM International Microscopy Congress     page: I20   2010.9

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  50. High-voltage testing of a 500-kV dc photocathode electron gun Invited Reviewed

    R. Nagai, R. Hajima, N. Nishimori, T. Muto, M. Yamamoto, Y. Honda, T. Muyajima, H. Iijima, M. Kuriki, M. Kuwahara, S. Okumi, T. Nakanishi

    Review of Scientific Instruments   Vol. 81   page: 033304   2010

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  51. Single electron spin resonance in a g-factor controlled semiconductor quantum dot Reviewed

    T. Kutsuwa, M. Kuwahara, K. Ono, H. Kosaka

    Physica E -Low-Dimensional System & Nano Structure   Vol. 42 ( 4 ) page: 821-824   2010

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  52. Single charge detection of an electron created by a photon in a g-factor engineered quantum dot Reviewed

    M. Kuwahara, T. Kutsuwa, K. Ono, H. Kosaka

    Applied Physics Letters   Vol. 96 ( 16 ) page: 163107   2010

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  53. High brightness and highly polarized electron beam for real-time measurement in SPLEEM Reviewed

    M. Kuwahara, A. Mano, Y. Nakagawa, S. Okumi, T. Nakanishi, M. Suzuki, T. Yasue, T. Koshikawa, X. Jin, N. Yamamoto, T. Ujihara, Y. Takeda, M. Yamamoto, T. Ohshima, T. Kohashi, T. Saka, T. Kato, H. Horinaka

    Proceedings of 7th International Symposium on Atomic Level Characterizations for New Materials and Devices 09     page: 84   2009.12

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  54. Development of a 500-kV photo-cathode DC gun for the ERL light sources in Japan Reviewed

    N. Nishimori, R. Nagai, H. Iijima, R. Hajima, M. Yamamoto, T. Muto, Y. Honda, T. Miyajima, M. Kuwahara, S. Okumi, T. Nakanishi

    Proceedings of Free Electron Laser 2009     page: 277   2009.9

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    Language:English  

  55. Real time magnetic imaging by spin-polarized low energy electron microscopy with highly spin-polarized and high brightness electron gun Reviewed

    M. Suzuki, M. Hashimoto, T. Yasue, T. Koshikawa, Y. Nakagawa, T. Konomi, A. Mano, N. Yamamoto, M. Kuwahara, M. Yamamoto, S. Okumi, T. Nakanishi, X. G. Jin, T. Ujihara, Y. Takeda, T. Kohashi, T. Ohshima, T. Saka, T. Kato, H. Horinaka

    Applied Physics Express   Vol. 3   page: 026601   2009

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  56. High brightness and high polarization electron source using transmission photocathode with GaAs-GaAsP superlattice layers Reviewed

    N. Yamamoto, T. Nakanishi, A. Mano, Y. Nakagawa, S. Okumi, M. Yamamoto, T. Konomi, X. Jin, T. Ujihara, Y. Takeda, T. Ohshima, T. Saka, T. Kato, H. Horinaka, T. Yasue, T. Koshikawa, M. Kuwahara,

    Journal of Applied Physics   Vol. 103   page: 064905-1-7   2008

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  57. Optical responses of quantum transport for single photo-electron detection

    M. Kuwahara, T. Kutsuwa, K. Ono, H. Kosaka

    Proceedings of 2008 International Symposium on Physics of Quantum Technology     page: 70   2008

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  58. Electrical field control of trions in the structure for quantum media conversion

    W. Ueno, H. Kosaka, T. Kutsuwa, M. Kuwahara, Y. Mitsumori, K. Edamatsu

    Proceedings of 2008 International Symposium on Physics of Quantum Technology     page: 74   2008

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  59. ESR measurements of quantum dot

    T. Kutsuwa, M. Kuwahara, K. Ono, H. Kosaka

    Proceedings of 2008 International Symposium on Physics of Quantum Technology     page: 72   2008

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  60. Laser forcusing system for high brightness polarized electron source for SPLEEM Reviewed

    A. Mano, N. Yamamoto, K. Tamagagi, S. Okumi, M. Yamamoto, M. Kuwahara, R. Sakai, T. Morino, A. Utsu, T. Nakanishi, T. Ohshima,

    AIP Conference Proceedings, PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM   Vol. 915   page: 1081   2007

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  61. Development of the new type polarized electron source for SPLEEM Reviewed

    S. Okumi, N. Yamamoto, K. Tamagaki, A. Mano, R. Sakai, M. Yamamoto, M. Kuwahara, T. Morino, A. Utsu, T. Nakanishi, S. Kim, T. Ujihara, Y. Takeda, T. Ohshima, T. Yasue, T. koshikawa,

    AIP Conference Proceedings, PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM   Vol. 915   page: 1085   2007

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  62. Initial emittance measurements for polarized electron gun with NEA-GaAs type photocathode Reviewed

    N. Yamamono, M. Yamamono, R. Sakai, T. Nakanishi, S. Okumi, M. Kuwahara, K. Tamagaki, T. Morino, A. Utsu, A. Mano, M. Kuriki, T. Ujihara, Y. Takeda,

    AIP Conference Proceedings, PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM   Vol. 915   page: 1071   2007

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  63. Production of high density polarized electron beam from GaAs-GaAsP superlattice photocathode Reviewed

    M. Yamamono, N. Yamamono, S. Okumi, R. Sakai, M. Kuwahara, T. Morino, K. Tamagaki, A. Mano, A. Utsu, T. Nakanishi, C. Bo, T. Ujihara, Y. Takeda, M. Kuriki

    AIP Conference Proceedings, PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM   Vol. 915   page: 1025   2007

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  64. Spin-polarized electrons extracted from GaAs tips using field emission Reviewed

    M. Kuwahara, T. Morino, T. Nakanishi,

    AIP Conference Proceedings, PROCEEDINGS OF THE 17TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM   Vol. 915   page: 1055   2007

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  65. Thermal emittance measurements for electron beams produced from bulk and superlattice negative electron affinity photocathodes Reviewed

    N. Yamamoto, M. Yamamoto, M. Kuwahara, R. Sakai, T. Morino, K. Tamagaki, A. Mano, A. Utsu, S. Okumi, T. Nakanishi, M. Kuriki, C. Bo, T. Ujihara, Y. Takeda

    Journal of Applied Physics   Vol. 102   page: 024904-1-6   2007

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  66. Generation of Spin Polarized Electron by Field Emission Reviewed

    M. Kuwahara, T. Nakanishi, S. Okumi, M. Yamamoto, M. Miyamoto, N. Yamamoto, K. Yasui, T. Morino, R. Sakai, K. Tamagaki, K. Yamaguchi,

    Polarized Sources and Targets: Proceedings of the Eleventh International Workshop     page: 152   2007

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  67. High field gradient polarized electron gun for ILC Reviewed

    M. Yamamoto, N. Yamamoto, T. Nakanishi, S. Okumi, M. Kuwahara, K. Yasui, T. Morino, R. Sakai, K. Tamagaki, F. Furuta, M. Kuriki, H. Matsumoto, M. Yoshioka

    Polarized Sources and Targets: Proceedings of the Eleventh International Workshop     page: 138   2007

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  68. Field Emission of Spin-Polarized Electrons Extracted from Photoexcited GaAs Tip Reviewed

    M. Kuwahara, T. Nakanishi, S. Okumi, M. Yamamoto, M. Miyamoto, N. Yamamoto, K. Yasui, T. Morino, R. Sakai, K. Tamagaki, K. Yamaguchi

    Japanese Journal of Applied Physics   Vol. 45 ( 8A ) page: 6245   2006

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  69. Recent PES Photocathode R&D at Nagoya University Reviewed

    M. Kuwahara, T. Nakanishi, S. Okumi, M. Yamamoto, F. Furuta, M. Miyamoto, N. Yamamoto, K. Naniwa, K. Yasui. T. Nishitani, O. Watanabe, Y. Takeda, H. Kobayakawa, Y. Takashima and K. Togawa

    Proceedings of 16th International Spin Physics Symposium (SPIN2004) and Workshop on Polarized Electron Sources and Polarimeters (PESP2004)     page: 953   2005

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  70. Present Status of 200 keV Polarized Electron Gun at Nagoya University Reviewed

    M. Yamamoto, N. Yamamoto, T. Nishitani, S. Okumi, F. Furuta, M. Miyamoto, M. Kuwahara, K. Naniwa and K. Yasui

    Proceedings of 16th International Spin Physics Symposium (SPIN2004) and Workshop on Polarized Electron Sources and Polarimeters (PESP2004)     page: 902   2005

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  71. Reduction of field emission dark current for high-field gradient electron gun by using a molybdenum cathode and titanium anode Reviewed

    F. Furuta, T. Nakanishi, S. Okumi, T. Gotou, M. Yamamoto, M. Miyamoto, M. Kuwahara, N. Yamamoto, K. Naniwa, K. Yasui, H. Matsumoto, M. Yoshioka and K. Togawa

    Nuclear Instruments and Methods in Physics Research Section A   Vol. 538   page: 33   2005

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  72. Properties of Field Emission Dark Current from Molybdenum and Titanium Electrodes Reviewed

    F. Furuta, M. Yamamoto, T. Nakanishi, S. Okumi, T. Gotoh, M. Miyamoto, M. Kuwahara, N. Yamamoto, K. Naniwa, K. Yasui, H. Matsumoto, M. Yoshioka and K. Togawa

    Proceedings of 16th International Spin Physics Symposium (SPIN2004) and Workshop on Polarized Electron Sources and Polarimeters (PESP2004)     page: 964   2005

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  73. Highly polarized electrons from GaAs-GaAsP and InGaAs-AlGaAs strained superlattice photocathode Reviewed

    T. Nishitani, T. Nakanishi, M. Yamamoto, S. Okumi, F. Furuta, M. Miyamoto, M. Kuwahara, N. Yamamoto, K. Naniwa, O. Watanabe, Y. Takeda, H. Kobayakawa, Y. Takashima, H. Horinaka, T. Matsuyama, K. Togawa, T. Saka, M. Tawada, T. Omori, Y. Kurihara, M. Yoshioka, K. Kato and T. Baba

    Journal of Applied Physics   Vol. 97   page: 094907 1-6   2005

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  74. Ultra-High-Vacuum Problem for 200 keV Polarized Electron Gun with NEA-GaAs Photocathode

    T. Nakanishi, M. Yamamoto, N. Yamamoto, S. Okumi, F. Furuta, M. Kuwahara, K. Naniwa, K. Yasui, H. Kobayakawa, Y. Takashima, H. Matsumoto, M. Kuriki and M. Yoshioka

    Proceedings of XXII International Linear Accelerator Conference (LINAC2004)     page: 201   2004

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  75. Highly Polarized Electrons from GaAs-GaAsP and InGaAs-AlGaAs Strained Layer Superlattice Photocathodes

    T. Nakanishi, T. Nishitani, M. Yamamoto, S. Okumi, F. Furuta, M. Kuwahara, N. Yamamoto, K. Naniwa, K. Yasui, O. Watanabe, Y. Takeda, H. Kobayakawa, Y. Takashima, H. Horinaka and T. Matsuyama

    Proceedings of XXII International Linear Accelerator Conference (LINAC2004)     page: 648   2004

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  76. An Electrode with Molybdenum-Cathode and Titanium-Anode to Minimize Field Emission Dark Currents

    T. Nakanishi, F. Furuta, S. Okumi, T. Gotou, M. Yamamoto, M. Kuwahara, N. Yamamoto, K. Naniwa, K. Yasui, H. Kobayakawa, Y. Takashima, H. Matsumoto, M. Yoshioka and K. Togawa

    Proceedings of XXII International Linear Accelerator Conference (LINAC2004)     page: 645   2004

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  77. A 200keV gun with NEA-GaAs photocathode to produce low emittance electron beam

    M. Yamamoto, K. Wada, N. Yamamoto, T. Nakanishi, S. Okumi, F. Furuta, T. Nishitani, M. Miyamoto, M. Kuwahara, K. Naniwa, Y. Takashima, H. Kobayakawa, M. Kuriki, H. Matsumoto, and M. Yoshioka

    FREE ELECTRON LASERS 2003   Vol. II   page: 39-40   2003

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  78. Basic R&D Studies for Lower Emittance Polarized Electron Guns Reviewed

    C. Suzuki, T. Nakanishi, S. Okumi, F. Furuta, K. Wada, T. Nishitani, M. Yamamoto, M. Kuwahara, T. Hirose, R. Mizuno, N. Yamamoto, H. Matsumoto, M. Yoshioka, H. Horinaka, K. Wada, T. Matsuyama and H. Kobayakawa

    Proceedings of 15th International Spin Physics Symposium (SPIN2002) and Workshop on Polarized Electron Sources and Polarimeters (PESP2002) published in AIP Conference Proceedings   Vol. 675   page: 1068   2003

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  79. 200 keV Polarized Electron Source at Nagoya University Reviewed

    K. Wada, M. Yamamoto, T. Nakanishi, S. Okumi, T. Gotoh, C. Suzuki, F. Furuta, T. Nishitani, M. Miyamoto, M. Kuwahara, T. Hirose, R. Mizuno, N. Yamamoto, H. Matsumoto and M. Yoshioka

    Proceedings of 15th International Spin Physics Symposium (SPIN2002) and Workshop on Polarized Electron Sources and Polarimeters (PESP2002) published in AIP Conference Proceedings   Vol. 675   page: 1063   2003

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    Language:English   Publishing type:Research paper (scientific journal)  

  80. Emittance measurement for 200-keV-electron beam extracted from NEA-GaAs photocathode using a pepper pot method Reviewed

    N. Yamamoto, M. Yamamoto, T. Nakanishi, S. Okumi, F. Furuta, T. Nishitani, M. Miyamoto, M. Kuwahara, K. Naniwa, Y. Takashima, H. Kobayakawa, M. Kuriki, H. Matsumoto, and M. Yoshioka

    FREE ELECTRON LASERS 2003   Vol. II   page: 51   2003

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  81. Measurement of Field Emission Dark Current from the Titanium, Copper, and Stainless Steel Electrodes under the High DC-Field Gradient Condition

    F. Furuta, C. Suzuki, T. Nakanishi, S. Okumi, T. Gotou, K. Wada, M. Yamamoto, T. Nishitani, M. Miyamoto, M. Kuwahara, T. Hirose, R. Mizuno, N. Yamamoto, H. Kobayakawa, H. Matsumoto and M. Yoshioka

    Proceedings of XXI International LINAC Conference (LINAC2002)     page: 431   2002

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  82. Charge limitation effects in photoemission from GaAsP strained layer cathode

    A Subashiev, Yu Mamaev, B. Reznikov, T. Nakanishi, K. Togawa, T. Nishitani, M. Kuwahara, T. Hirose, R. Mizuno

    Proceedings of the Ninth International Workshop Polarized Sources and Targets     page: 175   2002

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  83. 200keV Polarized Electron Source for Linear Collider

    M. Yamamoto, K. Wada, T. Nakanishi, S. Okumi, C. Suzuki, F. Furuta, T. Nishitani, M. Miyamoto, M. Kuwahara, T. Hirose, R. Mizuno, N. Yamamoto, O. Watanabe, H. Kobayakawa, H. Matsumoto and M. Yoshioka

    Proceedings of XXI International LINAC Conference (LINAC2002)     page: 680   2002

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  84. Test of Cesium Telluride Photocathode as a Feasibility Study on Polarized RF-gun Reviewed

    F. Furuta, H. Sugiyama, T. Nakanishi, S. Okumi, K. Togawa, C. Suzuki, K. Wada, M. Yamamoto, T. Nishitani, J. Watanabe, S. Kurahashi, M. Miyamoto, M. Kuwahara, R. Mizuno, T. Hirose, K. Kimura, H. Kobayakawa, Y. Takashima, M. Yoshioka and H. Matsumoto

    Proceedings of 14th International Spin Physics Symposium (SPIN2000) and Workshop on Polarized Electron Sources and Polarimeters (PES2000) published in AIP Conference Proceedings   Vol. 570   page: 1015   2001

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Books 2

  1. 電子・イオンビームハンドブック 第4版

    ( Role: Contributor ,  2.1 光励起電子源)

    日本学術振興会132委員会 編 編集委員長 臼井 博明  2021  ( ISBN:978-4-600-00624-2

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    Responsible for pages:16-23   Language:Japanese Book type:Scholarly book

  2. 最新 実用真空技術総覧

    最新 実用真空技術総覧 編集委員会 編( Role: Contributor ,  第7編 第1章 第1節「極高真空スピン偏極電子銃」)

    株式会社エヌ・ティー・エス  2019.2  ( ISBN:978-4-86043-559-2

Presentations 92

  1. Stroboscopic measurements in transmission electron microscopy using photoemission electron gun

    2022.10.11 

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    Event date: 2022.10

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  2. Time-resolved transmission electron microscopy in material science Invited

    Makoto Kuwahara

    Japan Geoscience Union Meeting 2022  2022.5.23  Japan Geoscience Union

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    Event date: 2022.5

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:Makuhari, Chiba   Country:Japan  

  3. 高スピン偏極パルス電子源を有する間分解透過電子顕微鏡の開発 Invited

    桑原真人

    日本顕微鏡学会第78回学術講演会  2022.5.11  日本顕微鏡学会

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    Event date: 2022.5

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:郡山市、福島県   Country:Japan  

  4. NEA半導体フォトカソードを応用した時間分解透過電子顕微鏡の開発と応用 Invited

    桑原真人

    次世代真空エレクトロニクス研究会 第4回定例研究会   2022.3.9  次世代真空エレクトロニクス研究会

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    Event date: 2022.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:オンライン  

  5. Recent progress of time-resolved measurements in the spin-polarized pulse-TEM Invited

    Makoto Kuwahara

    2022.3.3 

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    Event date: 2022.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:Online  

  6. Time-resolved measurement in ultrafast transmission electron microscopy International conference

    M. Kuwahara, K. Nakakura, M. Furui, T. Ishida, K. Saitoh

    International Conference for Materials and Systems for Sustainability 2021  2021.11.5  Institute of Materials and Systems for Sustainability, Nagoya University

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    Event date: 2021.11

    Language:English   Presentation type:Oral presentation (general)  

    Venue:online  

  7. 光陰極電子源を用いた100kVパルス透過電子顕微鏡による時間分解計測

    桑原真人, 水野りら, 中蔵虎二郎, 古井雅人, 森下英郎, 石田高史, 長沖功, 揚村寿英

    第82回応用物理学会秋季学術講演会  2021.9.10  応用物理学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:Online  

  8. Coherence in pulsed TEM using NEA semiconductor photocathode and its applications to time-resolved measurement Invited

    Makoto Kuwahara, Rina Yokoi, Wataru Nagata, Masato Furui, Kojiro Nakakura, Takafumi Ishida, Koh Saitoh, Nobuo Tanaka

    The 77th Annual Meeting of the Japanese Society of Microscopy  2021.6.16  The Japanese Society of Microscopy

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    Event date: 2021.6

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:Tsukuba  

  9. Time-resolved measurement in pulsed transmission electron microscopy Invited International conference

    Makoto Kuwahara, Lira Mizuno, Rina Yokoi, Yuya Yoshida, Shota Kuwahara, Takafumi Ishida, Koh Saitoh, Nobuo Tanaka

    The 77th Annual Meeting of the Japanese Society of Microscopy  2021.6.16  The Japanese Society of Microscopy

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    Event date: 2021.6

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Tsukuba  

  10. Time-resoleved transmission electron microscopy toward operando-measurement in geoscience Invited

    Makoto Kuwahara

    Japan Geoscience Union Meeting 2021  2021.6.3  Japan Geoscience Union

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    Event date: 2021.5 - 2021.6

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:On line  

  11. 時間分解電子顕微鏡の開発と応用 Invited

    桑原真人

    第2回次世代電子顕微鏡法講演会  2021.2.16  東京大学

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    Event date: 2021.2

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:online   Country:Japan  

  12. コヒーレント偏極電子線を用いたパルス電子顕微鏡と量子統計 Invited

    桑原真人

    電子光学設計技術分科会 第7回研究会 

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    Event date: 2020.10

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  13. Novel Transmission Electron Microscope Using High Brightness Pulsed Beam Emitted from NEA Photocathode International conference

    R. Yokoi, T. Ishida, M. Kuwahara, K. Saitoh

    International Conference on Materials and Systems for Sustainability 2019 (ICMaSS)  2019.11.2 

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    Event date: 2019.11

    Language:English   Presentation type:Poster presentation  

    Venue:Nagoya University, Nagoya, Japan   Country:Japan  

  14. Fine structure of surface plasmon on Au triangular nanoprisms via STEM-EELS International conference

    L. Mizuno, M. Kuwahara, S. Kuwahara, T. Ishida, K. Saitoh

    International Conference on Materials and Systems for Sustainability 2019 (ICMaSS) 

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    Event date: 2019.11

    Language:English   Presentation type:Poster presentation  

    Venue:Nagoya University, Nagoya, Japan   Country:Japan  

  15. High-brightness pulsed electron microscopy toward advanced measurement of time-evolution in nanomaterials Invited International conference

    M. Kuwahara, R. Yokoi, L. Mizuno, W. Nagata, Y. Yoshida, T. Ishida, T. Ujihara, K. Saitoh

    International Conference on Materials and Systems for Sustainability 2019 (ICMaSS)  2019.11.3 

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    Event date: 2019.11

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Nagoya University, Nagoya, Japan   Country:Japan  

  16. 高い縮退度を有する超短パルス電子線による顕微分析手法の開発 Invited

    桑原真人

    第2回表面真空学会若手部会研究会  2019.10.31 

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    Event date: 2019.10

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:物質・材料研究機構, 千現地区,つくば市   Country:Japan  

  17. コヒーレント偏極電子線をもちいた二次干渉実験

    桑原 真人,横井 里奈,永田 渉,石田 高史,

    第80回応用物理学会秋季学術講演会  2019.9.21 

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    Event date: 2019.9

    Language:English   Presentation type:Oral presentation (general)  

    Venue:北海道大学, 札幌市   Country:Japan  

  18. 120 kVフォトカソード電子銃を用いた⾼輝度パルス透過電⼦顕微鏡の開発

    横井 里奈, 永田 渉, 石田 高史, 長沖 功, 揚村 寿英, 桑原 真人, 齋藤 晃

    第80回応用物理学会秋季学術講演会  2019.9.21 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:北海道大学,札幌市   Country:Japan  

  19. STEM-EELSを用いた周期閉じ込め構造に誘起される表面プラズモンモードの研究

    水野りら,桑原真人,石田高史,齋藤晃

    日本物理学会2019年秋季大会(物性) 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:岐阜大学,岐阜市   Country:Japan  

  20. 超高速時間分解位相像を実現するコヒーレントパルス電子線 Invited

    桑原真人,横井里奈,水野りら,永田渉,石田高史,齋藤晃

    第4回 「表面界面の機能創成とデバイス応用」セミナー 

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    Event date: 2019.8

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:名古屋大学,名古屋市   Country:Japan  

  21. High-Brightness Bunched Electrons Using a Semiconductor Photocathode and Optimized Acceleration Field International conference

    R. Yokoi, T. Ishida, M. Kuwahara, K. Saitoh

    Microscopy & Microanalysis 2019 (M&M 2019) 

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    Event date: 2019.8

    Language:English   Presentation type:Poster presentation  

    Venue:Oregon Convention Center, Portland, OR, U. S. A.   Country:United States  

  22. Fine Structure of Plasmon Hybridization on Au nanotriangles via STEM-EELS International conference

    L. Mizuno, M. Kuwahara, S. Kuwahara, T. Ishida, K. Saitoh

    Microscopy & Microanalysis 2019 (M&M 2019) 

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    Event date: 2019.8

    Language:English   Presentation type:Poster presentation  

    Venue:Oregon Convention Center, Portland, OR, U. S. A.   Country:United States  

  23. Spin-Polarized Pulse-TEM Invited International conference

    Makoto Kuwahara

    Germany-Japan Joint Seminar on Advanced Electron Microscopy and its Application  2019.6.19 

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    Event date: 2019.6

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Nagoya University   Country:Japan  

  24. 金ナノプレートの局在表面プラズモンをもちいたカップリング効果の研究

    水野りら,石田高史,桑原彰太,桑原真人,齋藤 晃

    日本顕微鏡学会第75回学術講演会 

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    Event date: 2019.6

    Language:Japanese   Presentation type:Poster presentation  

    Venue:名古屋国際会議場,名古屋市   Country:Japan  

  25. Co-Zn-Fe合金の電子顕微鏡学的評価

    冨樫将孝,石田高史,小松正弥,長尾全寛,肖 英紀, 桑原真人,齋藤 晃

    日本顕微鏡学会第75回学術講演会 

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    Event date: 2019.6

    Language:Japanese   Presentation type:Poster presentation  

    Venue:名古屋国際会議場,名古屋市   Country:Japan  

  26. 高密度パルス電子線発生を可能にする120kVパルス透過電子顕微鏡の開発

    横井里奈,永田 渉,水野りら,石田高史,桑原真人,齋藤 晃

    日本顕微鏡学会第75回学術講演会 

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    Event date: 2019.6

    Language:Japanese   Presentation type:Poster presentation  

    Venue:名古屋国際会議場,名古屋市   Country:Japan  

  27. 時間分解EELSによる光励起したカーボンナノチューブのC-Kエッジの測定

    村山恒介,横井里奈,桑原真人,石田高史,齋藤 晃

    日本物理学会第74回年次大会(2019年春季) 

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    Event date: 2019.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:九州大学伊都キャンパス,福岡市   Country:Japan  

  28. 透過型電子顕微鏡を用いたCo-Zn-Fe合金の磁気構造観察

    冨樫将孝,石田高史,小松正弥,長尾全寛,肖 英紀,桑原真人,齋藤 晃

    日本物理学会第74回年次大会(2019年春季) 

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    Event date: 2019.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:九州大学伊都キャンパス,福岡市   Country:Japan  

  29. STEM-EELSを用いた金ナノプレートの局在表面プラズモン及びそのカップリング効果析

    水野りら,石田高史,桑原彰太,桑原真人,齋藤 晃

    日本物理学会第74回年次大会(2019年春季) 

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    Event date: 2019.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:九州大学伊都キャンパス,福岡市   Country:Japan  

  30. 高密度パルス電子線発生のための120kVフォトカソード電子銃の開発

    横井里奈,水野りら,篠崎 暉,石田高史,桑原真人,齋藤 晃

    日本物理学会第74回年次大会(2019年春季) 

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    Event date: 2019.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:九州大学伊都キャンパス,福岡市   Country:Japan  

  31. Pt/Co/Ta磁性多層膜の作製と電子顕微鏡を用いた磁気構造解析

    濱中幸祐,冨樫将孝,桑原真人,石田高史,齋藤 晃

    日本物理学会第74回年次大会(2019年春季 

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    Event date: 2019.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:九州大学伊都キャンパス,福岡市   Country:Japan  

  32. Semiconductor photocathode in a transmission electron microscope Invited International conference

    M. Kuwahara

    Photocathode Physics for Photoinjectors 2018 

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    Event date: 2018.10

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Santa Fe, New Mexico, USA   Country:United States  

  33. Magnetic structures in Nano-Fabricated Pt/Co/Ta Multilayer Film International conference

    K. Hamanaka,H. Suzuki,T. Ishida,M. Kuwahara,K. Saitoh

    19TH INTERNATIONAL MICROSCOPY CONGRESS 

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    Event date: 2018.9

    Language:English   Presentation type:Poster presentation  

    Venue:International Convention Centre,Sydney,Australia   Country:Australia  

  34. TEM-EELS of Photo-excited MWCNTs Using a Pulsed Electron Beam International conference

    K. Murayama,M. Kuwahara,T. Ishida,K. Saitoh

    19TH INTERNATIONAL MICROSCOPY CONGRESS 

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    Event date: 2018.9

    Language:English   Presentation type:Poster presentation  

    Venue:International Convention Centre,Sydney,Australia   Country:Australia  

  35. スピン偏極パルスTEMの開発とそのコヒーレンス Invited

    桑原真人

    第63回化合物新磁性材料専門研究会 

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    Event date: 2018.7

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:岡山大学   Country:Japan  

  36. Coherent pulsed beam in a spin-polarized TEM using an NEA photocathode Invited International conference

    Makoto Kuwahara

    The 31st International Vacuum Nanoelectronics Conference  

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    Event date: 2018.7

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Kyoto, Japan   Country:Japan  

  37. Coherent bunched beam in a spin-polarized TEM using an NEA photocathode Invited International conference

    M. Kuwahara

    RIKEN SEMINAR 

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    Event date: 2018.6

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Main Research Building,RIKEN, Wako,Japan   Country:Japan  

  38. NEA半導体フォトカソードを応用した電子顕微鏡開発とその性能 Invited

    桑原真人

    日本学術振興会第132委員会 第231回研究会 

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    Event date: 2018.6

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  39. Development of pulsed-TEM using a spin-polarized electron source and its application to ultrafast time-resolved measurement in energy and real spaces Invited

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    Event date: 2018.5

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  40. カーボンナノチューブのTEM-EELSにおける光励起依存性の研究

    村山恒介,桑原真人,石田高史,齋藤 晃

    日本顕微鏡学会第74回学術講演会 

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    Event date: 2018.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:久留米シティプラザ,久留米市   Country:Japan  

  41. Pt/Co/Ta磁性多層膜試料の作製と電子顕微鏡学的評価

    濱中幸祐,鈴木潤士,石田高史,桑原真人,齋藤 晃

    日本顕微鏡学会第74回学術講演会 

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    Event date: 2018.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:久留米シティプラザ,久留米市   Country:Japan  

  42. スピン偏極電子線をもちいた電子らせん波の生成

    冨樫将孝,桑原真人,齋藤 晃

    日本顕微鏡学会第74回学術講演会 

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    Event date: 2018.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:久留米シティプラザ,久留米市   Country:Japan  

  43. STEM-EELSを用いた金八面体ナノ粒子の局在表面プラズモンの研究

    水野りら,桑原真人,石田高史,亀山達矢,佐藤健太郎,齋藤 晃,鳥本 司

    日本顕微鏡学会第74回学術講演会 

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    Event date: 2018.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:久留米シティプラザ,久留米市   Country:Japan  

  44. 電子線ホログラフィーを用いたPt/Co/Ta多層膜ディスクの磁気構造解析

    桑原 真人, 鈴木潤士, 濱中幸佑, 石田高史, 齋藤 晃

    日本物理学会 第73回年次大会 

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    Event date: 2018.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  45. NEA半導体光陰極から放出される電子のもつエミッタンスと高い空間コヒーレンス

    桑原真人

    第65回応用物理学会春季学術講演会 

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    Event date: 2018.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  46. NEA半導体光陰極を応用した透過電子顕微鏡における時空間コヒーレンス Invited

    桑原真人

    第15 回真空ナノエレクトロニスシンポジウム 

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    Event date: 2018.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  47. コヒーレントスピン偏極パルス電子線による時間分解TEM観察 Invited

    桑原真人

    「その場観察研究部会」第2回 研究会 

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    Event date: 2017.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  48. Coherent bunched electron beam extracted from a semiconductor photocathode in a transmission electron microscope Invited International conference

    M. Kuwahara, K. Aoki, K. Murayama, H. Asano, T. Ujihara, K. Saitoh and N. Tanaka

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    Event date: 2017.9 - 2017.10

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  49. Intensity interference performed in spin-polarized transmission electron microscope Invited

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  50. Coherence of picosecond bunched electrons emitted from a semiconductor photocathode in transmission electron microscope Invited International conference

    M. Kuwahara, K. Aoki, H. Asano, T. Ujihara, N. Tanaka and K. Saitoh

    Electron Microscopy with High Temporal Resolution 

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    Event date: 2017.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Strasbourg   Country:France  

  51. Time-resolved TEM-EELS using a pulsed beam extracted from a semiconductor photocathode Invited International conference

    M. Kuwahara, K. Aoki, F. Ichihashi, T. Ujihara, N. Tanaka and K. Saitoh

    8th International Workshop on Electron Energy Loss Spectroscopy and Related Techniques 

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    Event date: 2017.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Okinawa, Japan   Country:Japan  

  52. Development of time-resolved TEM using a coherent pulsed beam emitted from an NEA photocathode Invited

    M. Kuwahara, K. Aoki, T. Ujihara, K. Saitoh, N. Tanaka

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    Event date: 2017.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:Hamamatsu, Japan   Country:Japan  

  53. Beam properties of picosecond bunched electrons in a time-resolved TEM using a semiconductor photocathode

    M. Kuwahara, K. Aoki, Y. Nambo, T. Ujihara, N. Tanaka, K. Saitoh

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    Event date: 2017.2

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  54. Coherence Volume of Electron Wavepacket Emitted from a Semiconductor Photocathode in a Transmission Electron Microscope Invited International conference

    M. Kuwahara, K. Aoki, H. Asano, T. Ujihara, N. Tanaka and K. Saitoh

    Electron Holography Workshop 2017 

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    Event date: 2017.2

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Saitama, Japan   Country:Japan  

  55. 半導体光陰極を用いた次世代透過電子顕微鏡の開発 Invited

    桑原真人

    ナノテスティング学会電子線応用技術研究会第9回研究会 

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    Event date: 2016.12

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  56. 半導体フォトカソードを用いたパルス透過電子顕微鏡 Invited

    桑原真人

    日本顕微鏡学会関西支部・平成 28 年度特別講演会 

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    Event date: 2016.10

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  57. 半導体光陰極を利用したTEMにおける電子波特性 Invited

    桑原真人、宇治原徹、田中信夫、齋藤晃

    日本顕微鏡学会・電子光学設計技術研究部会・平成28年度研究会 

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    Event date: 2016.10

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  58. コヒーレントパルス透過電子顕微鏡の光励起および緩和過程観察への応用 Invited

    桑原真人, 青木幸太, 宇治原徹, 浅野秀文, 齋藤晃, 田中信夫

    日本物理学会2016秋季大会 

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    Event date: 2016.9

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  59. 半導体光陰極を用いた次世代透過電子顕微鏡の開発 Invited

    桑原真人, 青木幸太, 鈴木潤士, 宇治原徹, 浅野秀文, 齋藤晃, 田中信夫

    第77回応用物理学会秋季大会 

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    Event date: 2016.9

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  60. Coherence of a pulsed electron beam extracted from a semiconductor photocathode in transmission electron microscope Invited International conference

    M. Kuwahara, K. Aoki, H. Suzuki, H. Asano, T. Ujihara, K. Saitoh, N. Tanaka

    The 16th European Microscopy Congress 

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    Event date: 2016.8 - 2016.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:France  

  61. 光陰極平面から放出されるパルス電子線の空間電荷効果

    桑原真人、青木幸太、鈴木潤士、宇治原徹、齋藤晃、田中信夫

    日本顕微鏡学会 第72回学術講演会 

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    Event date: 2016.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:仙台   Country:Japan  

  62. コヒーレントスピン偏極電子線をもちいた時間分解顕微法の開発

    桑原真人

    日本物理学会第71回年次大会 

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    Event date: 2016.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  63. Spinor interfernce in transmission electron microscope

    M. Kuwahara, K. Sameshima, K. Aoki, H. Asano, T> Ujihara, K. Saitoh, N. Tanaka

    Internatinal Symposium on EcoTopia Science 

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    Event date: 2015.11

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  64. Time-resolved LVTEM using spin-polarized electron beam International conference

    Makoto Kuwahara

    Young Scientists Satellite Meeting in The 2nd East-Asia Microscopy Conference 

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    Event date: 2015.11

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  65. Coherences of spin-polarized and pulsed electron beam extracted from a semiconductor photocathode in TEM International conference

    Makoto Kuwahara

    The 2nd East-Asia Microscopy Conference 

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    Event date: 2015.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  66. スピン偏極透過電子顕微鏡が拓く材料解析の可能性

    桑原真人

    日本物理学会2015年秋季大会 

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    Event date: 2015.9

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:関西大学   Country:Japan  

  67. スピン偏極電子源とその磁性体観察の可能性

    桑原真人

    第26回基礎セミナー「ナノスピン構造の作製・評価技術」 

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    Event date: 2015.8

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

  68. 負の電子親和性をもつエミッタから放出される 電子の性質

    桑原 真人,南保 由人,齋藤 晃,浅野 秀文,宇 治原 徹,田中 信夫

    日本顕微鏡学会第71回学術講演会 

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    Event date: 2015.5

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  69. スピン偏極パルスTEMにおけるコヒーレンス

    [1] 桑原真人、南保由人、鮫島健輔、浅野秀文、宇治原徹、田中信夫

    2014年度 超高分解能顕微鏡法分科会 研究会 

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    Event date: 2015.2

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  70. スピン偏極透過電子顕微鏡

    桑原 真人、南保 由人、齋藤晃、宇治原徹、田中信夫

    荷電粒子ビームの工業への応用第132 委員会 第212回研究会 

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    Event date: 2014.10

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  71. Spatial and Temporal Coherences in Spin-Polarized Transmission Electron Microscopy International conference

    M, Kuwahara, S. Kusunoki, Y. Nambo, K. Sameshima, K. Saitoh, T. Ujihara, H. Asano, Y. Takeda, N. Tanaka

    18th International Microscopy Congress 

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    Event date: 2014.9

    Language:English   Presentation type:Poster presentation  

    Country:Czech Republic  

  72. Sub-picosencond electron beam and femtosecond optical pump system in spin-polarized TEM International conference

    M, Kuwahara, S. Kusunoki, Y. Nambo, K. Sameshima, K. Saitoh, T. Ujihara, H. Asano, Y. Takeda, N. Tanaka

    18th International Microscopy Congress 

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    Event date: 2014.9

    Language:English   Presentation type:Poster presentation  

    Country:Czech Republic  

  73. スピン偏極パルスTEMにおけるコヒーレンス

    桑原真人、楠聡一郎、南保由人、 金秀光、齋藤晃、浅野秀文、宇治原徹、竹田美和、田中信夫

    日本放射光学会第6回若手研究会 

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    Event date: 2014.8

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  74. スピン偏極TEMにおける偏極電子線のコヒーレンス評価

    桑原真人、楠聡一郎、南保由人、浅野秀文、齋藤晃、宇治原徹、竹田美和、田中信夫

    日本顕微鏡学会 第70回学術講演会 

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    Event date: 2014.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  75. スピン偏極パルスTEMによるピコ秒パルス電子線発生

    桑原真人、南保由人、浅野秀文、齋藤晃、宇治原徹、田中信夫

    日本顕微鏡学会 第70回学術講演会 

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    Event date: 2014.5

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  76. Spatial and Temporal Coherences in Spin-Polarized Transmission Electron Microscopy International conference

    M. Kuwahara, S. Kusunoki, Y. Nambo, K. Sameshima, K. Saitoh, T. Ujihara, H. Asano, Y. Takeda, N. Tanaka

    The 4th International Symposium on Advanced Microscopy and Theoretical Calculations 

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    Event date: 2014.5

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  77. 半導体光陰極を用いたTEMの空間コヒーレンス測定

    桑原真人、南保由人、 鮫島健輔、 楠聡一郎、齋藤晃、宇治原徹、浅野秀文、竹田美和、田中信夫

    日本物理学会 第69回年次大会 

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    Event date: 2014.3

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  78. Possibility of Time-Resolved Measurement in Spin-Polarized TEM International conference

    M. Kuwahara, Y. Nambo, K. Sameshima, K. Saitoh, T. Ujihara, H. Asano, Y. Takeda and N. Tanaka,

    International Symposium on EcoTopia Science 2013 

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    Event date: 2013.12

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  79. Development of spin-polarized transmission electron microscope International conference

    M. Kuwahara, S. Kusunoki, Y. Nambo, K. Sameshima, K. Saitoh, T. Ujihara, H Asano, Y Takeda, T Nakanishi and N Tanaka,

    9th International Symposium on Atomic Level Characterizations for New Materials and Devices `13 

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    Event date: 2013.12

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  80. スピン偏極パルスTEM

    桑原真人, 楠総一郎, 南保由人, 鮫島健輔, 齋藤晃, 宇治原徹, 浅野秀文, 竹田美和, 田中信夫

    日本顕微鏡学会第57回シンポジウム 

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    Event date: 2013.11

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  81. スピン偏極パルスTEMによるパルス同期TEM像の取得

    桑原 真人,南保 由人,楠 聡一郎,齋藤 晃,宇治原 徹,竹田 美和,中西 彊,田中 信夫

    日本顕微鏡学会第69回学術講演会 

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    Event date: 2013.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:ホテル阪急エキスポパーク   Country:Japan  

  82. Development of Spin-Polarized Transmission Electron Microscope International conference

    Makoto Kuwahara

    NCEM Seminars 

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    Event date: 2013.3

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  83. Spin-polarized transmission electron microscope toward an analysis of sub-picosecond dynamics International conference

    Makoto Kuwahara

    The 3rd Banff Meeting on Structural Dynamics Ultrafast Dynamics with X-Ray and Electrons 

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    Event date: 2013.2

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  84. Development of spin-polarized transmission electron microscope International conference

    Makoto Kuwahara

    Condensed-matter Physics & Materials Science Seminar 

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    Event date: 2013.2

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  85. スピン偏極透過電子顕微鏡の開発とその性能

    桑原真人、楠聡一郎、宇治原徹、浅野秀文、竹田美和、中西彊、齋藤晃、田中信夫

    日本顕微鏡学会第68回学術講演会 

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    Event date: 2012.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:つくば国際会議場   Country:Japan  

  86. Spin-polarized TEM using an NEA photocathode International conference

    M. Kuwahara, S. Kusunoki, K. Saitoh, T. Ujihara, and N. Tanaka

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    Event date: 2012.5

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  87. Injection system of spin-polarized transmission microscopy

    International Symposium on EcoTopia Science 2011 

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    Event date: 2011.12

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  88. Development of spin-polarized and pulsed TEM International conference

    M. Kuwahara, T. Nakanishi, Y. Takeda, K. Saito, T. Ujihara, H. Asano, and N. Tanaka

    Electron Microscopy and Analysis Group Conference 2011 

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    Event date: 2011.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  89. スピン偏極パルスTEM用電子源と照射系の開発

    桑原真人、中西彊、竹田美和、浅野秀文、齋藤晃、宇治原徹、田中信夫

    日本顕微鏡学会第67回学術講演会 

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    Event date: 2011.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  90. Superlattice photocathode development for low emittance International conference

    Photocathode Physics for Photoinjectors 

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    Event date: 2010.10

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:United States  

  91. Pulsed spin-polarized electron source toward a transmission electron microscope International conference

    M. Kuwahara, T. Nakanishi, N. Tanaka, Y. Takeda, H. Asano, K. Saito, T. Ujihara

    The 17th IFSM International Microscopy Congress 

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    Event date: 2010.9

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  92. スピン偏極パルスTEM用電子源の特性評価

    桒原 真人, 中西 彊, 田中 信夫, 竹田 美和, 浅野 秀文, 斎藤 晃, 宇治原 徹

    日本顕微鏡学会66回学術講演会 

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    Event date: 2010.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:名古屋国際会議場   Country:Japan  

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Research Project for Joint Research, Competitive Funding, etc. 4

  1. コヒーレント超短パルス電子線発生装置を活用した超時空間分解電子顕微鏡

    2018.11 - 2021.3

    未来社会創造事業「共通基盤」領域 

    桑原真人

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    Grant type:Competitive

  2. スピン偏極電子線の超短パルス化と量子性の追求

    2011.4 - 2014.3

    学内共同研究 

  3. ERL用電子銃の実用化に向けた新技術開発

    2009.4 - 2011.3

    国内共同研究 

  4. ERL用電子銃の実用化に向けた新技術開発

    2009.4 - 2010.3

    国内共同研究 

KAKENHI (Grants-in-Aid for Scientific Research) 10

  1. Ultra-fast operando measurement using pulse electron beam

    Grant number:21H04637  2021.4 - 2025.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\41860000 ( Direct Cost: \32200000 、 Indirect Cost:\9660000 )

  2. Development of novel photo-induced phase conversion materials based on quantum dynamics control of Charge-Structure-Spin-Photon coupled systems

    Grant number:18H05208  2018.4 - 2023.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Specially Promoted Research

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    Authorship:Coinvestigator(s)  Grant type:Competitive

  3. 電子ビームの軌道角運動量測定法の開発およびその応用研究

    Grant number:18H01884  2018.4 - 2022.3

    科学研究費助成事業  基盤研究(B)

    内田 正哉, 齋藤 晃, 桑原 真人

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    本研究では、電子ビームの軌道角運動量測定法を開発し、その応用研究を行うことを目的に研究を遂行している。令和3年度の主な成果は、以下の通りである。
    <BR>
    昨年度に引き続き、新型コロナ流行による影響を大きく受け、研究の中断変更を余儀なくされた。非弾性散乱電子の軌道角運動量を検出するためには、これまでに作製し研究に利用してきた数ミクロンメートル大の「回折格子」よりもさらに小さい回折格子が必要であることが分かった。その加工には本学等が所有の液体ガリウム金属イオン源集束イオンビーム(FIB)では難しく、より微細な加工ができるヘリウムイオン顕微鏡装置が必要であった。当時、国内で稼働し利用できるヘリウムイオン顕微鏡装置は産業技術総合研究所(つくば市)所有の装置のみであった。産業技術総合研究所所有のヘリウムイオン顕微鏡の外部利用が可能となった年度後半時に、微細加工を行った。作製した回折格子を本学および名古屋大学の電子顕微鏡をもちいて評価を行った。軌道角運動量をもつ電子を生成する「フォーク型回折格子」として、われわれの知る限り、世界最小のもの(回折格子間隔約10nm)を作製することができた。しかしながら、非弾性散乱電子の検出には至っていない。回折パターン等を変え改良した「フォーク型回折格子」を新たに設計し、ヘリウムイオン顕微鏡による再加工をする予定である。また、昨年度に発案した電場型レンズ、位相板の設計を進め、試作をマイクロドリルをもちいた機械加工及びFIBにより行った。
    令和3年度が最終年度であるため、記入しない。
    令和3年度が最終年度であるため、記入しない。

  4. Development of a novel spin-analysis using a coherent spin-polarized electron beam

    Grant number:17H02737  2017.4 - 2021.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Kuwahara Makoto

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\17550000 ( Direct Cost: \13500000 、 Indirect Cost:\4050000 )

    Coherent spin-polarized electron beam was applied to conversion probe-beam in a low-voltage scanning electron microscope to reduce chromatic aberration and enhance the spatial resolution of spin-resolved analysis. Alongside we succeeded in nano-structure analysis of magnetic materials and time-resolved measurement with pico-second temporal resolution using the newly developed electron microscopy. Consequently, our analytical methods can clarify dynamics of phase-transitions and relaxation process in the local state of magnetism. In contrast, considering the abilities of spin-polarization and long temporal and spatial coherent lengths that contribute to enhance the antibunching effect in an intensity interference measurement, we could reveal the spin-effect in the second-order interference term. These result in this project will open new spin-analysis involving quantum effects for nano-imaging of functional materials.

  5. Experimental verification of the generation of quantum entanglement state of two electrons and the quantum interference phenomena

    Grant number:17H01072  2017.4 - 2021.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    Saitoh Koh

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    We have developed an electron gun that generates structured electron beams having a specific amplitude and phase distribution by illuminating a semiconductor photocathode with structured light. An optical system that generates structured light with a specific intensity distribution was constructed using a spatial phase modulator and mounted on an electron microscope. It was confirmed that electron beams are generated by the structured light generated by the present optical system. We also conducted an intensity interference experiment using spin-polarized electrons, and found that electron beams with spin polarizations of ± 80% show anti-bunching phenomena which is not observed by electron beams with a spin polarization of 0%. In addition, we constructed a theory that describes the quantum interference effect and the breaking of Bell's inequality, and elucidated the mechanism by which weak values occur.

  6. コヒーレント偏極電子線による時間相関測定

    2015.4 - 2017.3

    科学研究費補助金 

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    Authorship:Principal investigator 

  7. 非線形光学効果を応用したスピン偏極量子ビーム源の開発

    2013.4 - 2016.3

    科学研究費補助金  若手研究(A)

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    Authorship:Principal investigator 

  8. Development of Spin-Polarized and Pulsed TEM for Nano-Spin Analysis

    2012.1

    Grant-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research(S)

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    Authorship:Coinvestigator(s) 

  9. 高輝度フォトカソード電子源の高効率化とコヒーレンスの応用

    2010.4 - 2012.3

    科学研究費補助金  若手研究(B) 22740157

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    Authorship:Principal investigator 

  10. 超低エミッタンスビームを実現するカーボンナノチューブ-スピン偏極電子源の開発

    2005.4 - 2007.3

    科学研究費補助金  特別研究員奨励費 H17-7615

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    Authorship:Principal investigator 

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Industrial property rights 2

  1. スピン偏極電子線のコヒーレンス測定装置と、その利用方法

    桑原真人, 宇治原徹, 齋藤晃, 田中信夫

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    Applicant:国立大学法人名古屋大学

    Application no:15/516,976  Date applied:2015.9

    Announcement no:US 2017/0309446  Date announced:2017.10

    Patent/Registration no:9,881,767  Date registered:2018.1 

    Country of applicant:Foreign country  

  2. 電子顕微鏡

    田中信夫、中西彊、竹田美和、浅野秀文、齋藤晃、宇治原徹、桑原真人

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    Applicant:国立大学法人 名古屋大学

    Application no:PCT/JP2011/053790  Date applied:2012.2

    Country of applicant:Domestic  

 

Social Contribution 3

  1. 時間分解電子顕微鏡の開発

    Role(s):Lecturer

    名古屋大学工学部・工学研究科  テクノ・フェアー名大2022  2022.10

  2. ミクロな世界が未来を変える

    Role(s):Lecturer

    あいちサイエンスフェスティバル  名古屋大学出前授業in豊橋2020  2020.12

  3. 省エネルギーデバイス開発・医薬研究を加速する時間分解電子顕微鏡の開発

    Role(s):Lecturer

    名古屋大学工学部・工学研究科  テクノ・フェアー名大2020  2020.10

Media Coverage 2

  1. 先端人:電子顕微鏡に新たな性能を Newspaper, magazine

    朝日新聞  16面  2020.10

  2. 金ナノ粒子光で融合 Newspaper, magazine

    日刊工業新聞  25面  2020.7